Sunshine Oilsands, a Calgary-based energy company backed by Chinese investors, plans to raise up to $606 million via an initial public offering ahead of listing on the Hong Kong stock exchange.

Sunshine Oilsands's planned listing comes amid a revitalization in IPOs and corporate bond sales in Hong Kong, suggesting that the window for fund-raising in the territory, home to the world's busiest stock exchange, has reopened following a recent rebound in share prices. The benchmark Hang Seng Index has risen 13% so far this year.